<div dir="ltr">I think the 1N4001 would be fine. The zender would not work since it will breakdown at 3.3V in one direction and one diode drop in the other. But you can use a zener in series with a rectifying diode to increase the clamped voltage to reduce the amount of time the inductive current takes to decay.  Using a single rectifier diode takes the longest length of time for the current to dissipate. <div><br></div><div>Shane</div></div><br><div class="gmail_quote"><div dir="ltr">On Sun, Jan 8, 2017 at 3:46 PM Craig Cook <<a href="mailto:cncook001@yahoo.com">cncook001@yahoo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" class="gmail_msg"><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77026" class="gmail_msg">Sounds good.  I'll order some of those.</div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77024" class="gmail_msg"><br class="gmail_msg"></div><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76952" class="gmail_msg">For a diode, I have 10 of these 1N4001.  Would that work?</div><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77060" class="gmail_msg"><br class="gmail_msg"></div><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77090" class="gmail_msg">I also have 10 zenner diodes, BZX79-C3V3<br class="gmail_msg"></div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76951" class="gmail_msg"><span class="gmail_msg"><br class="gmail_msg"></span></div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77196" class="gmail_msg"><span id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77195" class="gmail_msg">Or, what do you recommend.  May as well add to my order.<br class="gmail_msg"></span></div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77198" class="gmail_msg"><span class="gmail_msg"><br class="gmail_msg"></span></div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77091" class="gmail_msg"><span id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77200" class="gmail_msg">Thanks</span></div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77162" class="gmail_msg"><span class="gmail_msg"><br class="gmail_msg"></span></div><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77095" class="gmail_msg"><span class="gmail_msg">Craig</span><br class="gmail_msg"></div><div class="m_5374483825309399725qtdSeparateBR gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76943"><br class="gmail_msg"></div><div class="m_5374483825309399725yahoo_quoted gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76948" style="display:block">  <div style="font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76947" class="gmail_msg"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76946" class="gmail_msg"> <div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76945" class="gmail_msg"> <font id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76944" size="2" face="Arial" class="gmail_msg"></font></div></div></div></div></div></div><div class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" class="gmail_msg"><div class="m_5374483825309399725yahoo_quoted gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76948" style="display:block"><div style="font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76947" class="gmail_msg"><div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76946" class="gmail_msg"><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76945" class="gmail_msg"><font id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76944" size="2" face="Arial" class="gmail_msg"> <hr id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77206" size="1" class="gmail_msg"> <b class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">From:</span></b> Shane Trent <<a href="mailto:shanedtrent@gmail.com" class="gmail_msg" target="_blank">shanedtrent@gmail.com</a>><br class="gmail_msg"> <b class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">To:</span></b> Craig Cook <<a href="mailto:cncook001@yahoo.com" class="gmail_msg" target="_blank">cncook001@yahoo.com</a>>; Carl Nobile <<a href="mailto:carl.nobile@gmail.com" class="gmail_msg" target="_blank">carl.nobile@gmail.com</a>> <br class="gmail_msg"><b class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">Cc:</span></b> TriEmbed <<a href="mailto:triembed@triembed.org" class="gmail_msg" target="_blank">triembed@triembed.org</a>><br class="gmail_msg"> </font></div></div></div></div></div></div><div class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" class="gmail_msg"><div class="m_5374483825309399725yahoo_quoted gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76948" style="display:block"><div style="font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76947" class="gmail_msg"><div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76946" class="gmail_msg"><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76945" class="gmail_msg"><font id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76944" size="2" face="Arial" class="gmail_msg"><b class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">Sent:</span></b> Sunday, January 8, 2017 3:25 PM</font></div></div></div></div></div></div><div class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" class="gmail_msg"><div class="m_5374483825309399725yahoo_quoted gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76948" style="display:block"><div style="font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76947" class="gmail_msg"><div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76946" class="gmail_msg"><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76945" class="gmail_msg"><font id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76944" size="2" face="Arial" class="gmail_msg"><br class="gmail_msg"> <b class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">Subject:</span></b> Re: [TriEmbed] Pinewood derby help<br class="gmail_msg"> </font></div></div></div></div></div></div><div class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" class="gmail_msg"><div class="m_5374483825309399725yahoo_quoted gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76948" style="display:block"><div style="font-family:HelveticaNeue-Light,Helvetica Neue Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76947" class="gmail_msg"><div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_76946" class="gmail_msg"> <div class="m_5374483825309399725y_msg_container gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77124"><br class="gmail_msg"><div id="m_5374483825309399725yiv0473640145" class="gmail_msg"><div id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77127" class="gmail_msg"><div dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77126" class="gmail_msg"><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77125">Craig,</div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr"><br clear="none" class="gmail_msg"></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77129">I would recommend a transistor with a lower gate threshold voltage. The transistor below is under $1, has a low Vgs threshold and a low Rds. </div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr"><br clear="none" class="gmail_msg"></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr"><a rel="nofollow" shape="rect" href="http://www.digikey.com/product-detail/en/infineon-technologies/IPP039N04LGXKSA1/IPP039N04LGXKSA1-ND/2081141" class="gmail_msg" target="_blank">http://www.digikey.com/product-detail/en/infineon-technologies/IPP039N04LGXKSA1/IPP039N04LGXKSA1-ND/2081141</a></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77160"><br clear="none" class="gmail_msg"></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77131">Just make sure that the diode is reversed biased, cathode (stripe) connected to +5V. The closer you can get to putting the diode across the back of the motor the better. Across the leads going to the motor is a good second choice.</div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr"><br clear="none" class="gmail_msg"></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77158">I think you have the concept down.</div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr" id="m_5374483825309399725yui_3_16_0_ym19_1_1483893213641_77133"><br clear="none" class="gmail_msg"></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr">Shane<br clear="none" class="gmail_msg"><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg"><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none"></div><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg"><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none"></div></div><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none"><div class="m_5374483825309399725yiv0473640145yqt6740068674 gmail_msg" id="m_5374483825309399725yiv0473640145yqt03167"><div class="m_5374483825309399725yiv0473640145gmail_quote m_5374483825309399725yiv0473640145gmail_msg gmail_msg"><div class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" dir="ltr">On Sun, Jan 8, 2017 at 3:01 PM Craig Cook <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:cncook001@yahoo.com" target="_blank">cncook001@yahoo.com</a>> wrote:<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none"></div><blockquote class="m_5374483825309399725yiv0473640145gmail_quote m_5374483825309399725yiv0473640145gmail_msg gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I think you are saying if I replace the IRF510 MOSFET with one of these:<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
FQP30N06 N-Channel NPN MOSFET<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
I could remove the 2N3904 from the circuit.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
But, I also need a diode to sit between the +V and the load, which in my case is the motor.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Then I would have something like this:<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
CHIP -> 1k resistor -> gate on the FQP30N06<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
I would have external power (probably 5V) -> diode -> motor -> Drain on FQP30N06<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
When the CHIP sends the signal to the Gate it opens the circuit and the motor turns on.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Thanks<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Craig<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
________________________________<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
From: Shane Trent <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:shanedtrent@gmail.com" target="_blank">shanedtrent@gmail.com</a>><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
To: Craig Cook <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:cncook001@yahoo.com" target="_blank">cncook001@yahoo.com</a>>; Carl Nobile <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:carl.nobile@gmail.com" target="_blank">carl.nobile@gmail.com</a>><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Cc: TriEmbed <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Sent: Sunday, January 8, 2017 1:45 PM<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Subject: Re: [TriEmbed] Pinewood derby help<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Craig,<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
That circuit looks a little wonky. It seems they want to use the 2N3904 for voltage translation (the FET is not logic level sensitive, it is famous because you could buy it at Radio Shack) but they do not provide a ground reference for the emitter of the 2N3904, the emitter only connects to the FET's gate.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
The BJT would turn on when the gate voltage (through the 4.7k resistor) reaches around 0.6V above the emitter voltage but the emitter voltage is floating with no ground reference. So if the circuit did turn on, it would pull the FET gate voltage up and turn on the FET. Turning off the FET has it's own issues though since there is no path to drain current from the FET gate, the FET will turn off in the semi random time it takes for the gate charge to leak away. You could make it work by putting a large resistor between the FET gate and GND but the FET would turn on faster than it would turn off.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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It would be much more effective if you could use a more sensitive FET that could be driven directly from the logic pin (via a 1k or so resistor). This would let you drive current to turn on the FET as well as sink current to turn off the FET.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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Note they are also missing a kickback diode across the load so you would be dumping nasty high frequency, high voltage spikes back into the power rail and eventually your chips will start acting oddly before dying. Do not skip the kickback diode, the body diode of the MOSFET does nothing to help tame the inductive kick when the FET is switched off.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
Shane<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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On Sun, Jan 8, 2017 at 12:20 PM Craig Cook via TriEmbed <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>> wrote:<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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Ah, learning more.  This is the project I am looking at:<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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><a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="https://chip.hackster.io/user024507/motor-on-9c6bd1?ref=channel&ref_id=5276_trending___&offset=22" target="_blank">https://chip.hackster.io/user024507/motor-on-9c6bd1?ref=channel&ref_id=5276_trending___&offset=22</a><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>Is the 2N3904 working as an isolator?<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>The donor truck contains these:<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>BR8550D 064 (x 4)<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>C1815Y 5L<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>Super Chip STRX3A, 60100395<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>Could I reuse the C1815Y for my isolator?<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>I also have these new PN2222ABU, BC547B, P2N2222AG<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>I could attach a picture of donor truck board, but it would have to be less than 100k.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>Thanks<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>Craig<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>________________________________<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
> From: Carl Nobile <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:carl.nobile@gmail.com" target="_blank">carl.nobile@gmail.com</a>><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>To: Craig Cook <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:cncook001@yahoo.com" target="_blank">cncook001@yahoo.com</a>><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>Cc: TriEmbed <<a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>Sent: Sunday, January 8, 2017 11:10 AM<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>Subject: Re: [TriEmbed] Pinewood derby help<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>Yes, you will need something like a MOSFET to handle the higher current that the motor will draw and a different power souce that what is being used for the CHIP, but that won't isolate the motor from the electronics. You will still need an opto isolator.<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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>~Carl<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>_______________________________________________<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>Triangle, NC Embedded Computing mailing list<br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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><a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="http://mail.triembed.org/mailman/listinfo/triembed_triembed.org" target="_blank">http://mail.triembed.org/mailman/listinfo/triembed_triembed.org</a><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
>TriEmbed web site: <a rel="nofollow" shape="rect" class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" href="http://triembed.org/" target="_blank">http://TriEmbed.org</a><br class="m_5374483825309399725yiv0473640145gmail_msg gmail_msg" clear="none">
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